This is the second of a three-part series of papers which presents the principle and architecture of the CRNM, a trajectory-oriented, carriageway-based road network data model. The first part of the series has introdu...This is the second of a three-part series of papers which presents the principle and architecture of the CRNM, a trajectory-oriented, carriageway-based road network data model. The first part of the series has introduced a general background of building trajectory-oriented road network data models, including motivation, related works, and basic concepts. Based on it, this paper describs the CRNM in detail. At first, the notion of basic roadway entity is proposed and discussed. Secondly, carriageway is selected as the basic roadway entity after compared with other kinds of roadway, and approaches to representing other roadways with carriageways are introduced. At last, an overall architecture of the CRNM is proposed.展开更多
This is the first of a three-part series of pape rs which introduces a general background of building trajectory-oriented road net work data models, including motivation, related works, and basic concepts. The p urpos...This is the first of a three-part series of pape rs which introduces a general background of building trajectory-oriented road net work data models, including motivation, related works, and basic concepts. The p urpose of the series is to develop a trajectory-oriented road network data mode l, namely carriageway-based road network data model (CRNM). Part 1 deals with t he modeling background. Part 2 proposes the principle and architecture of the CR NM. Part 3 investigates the implementation of the CRNM in a case study. In the p resent paper, the challenges of managing trajectory data are discussed. Then, de veloping trajectory-oriented road network data models is proposed as a solution and existing road network data models are reviewed. Basic representation approa ches of a road network are introduced as well as its constitution.展开更多
针对传统的Web GIS功能简单,可扩展性差等缺点,引入SOA架构和Web服务理念,以及日益增长的地理信息的服务需求,提出了服务式GIS的三要素结构,着重阐述了交通网络分析数据模型及其功能,并探讨了如何以Super Map i Server为平台来设计并实...针对传统的Web GIS功能简单,可扩展性差等缺点,引入SOA架构和Web服务理念,以及日益增长的地理信息的服务需求,提出了服务式GIS的三要素结构,着重阐述了交通网络分析数据模型及其功能,并探讨了如何以Super Map i Server为平台来设计并实现基于服务式GIS理念的城市交通网络分析信息查询系统,实验测试结果表明该系统可以满足人们日常工作与旅游出行的交通网络分析与查询的需求。展开更多
文摘This is the second of a three-part series of papers which presents the principle and architecture of the CRNM, a trajectory-oriented, carriageway-based road network data model. The first part of the series has introduced a general background of building trajectory-oriented road network data models, including motivation, related works, and basic concepts. Based on it, this paper describs the CRNM in detail. At first, the notion of basic roadway entity is proposed and discussed. Secondly, carriageway is selected as the basic roadway entity after compared with other kinds of roadway, and approaches to representing other roadways with carriageways are introduced. At last, an overall architecture of the CRNM is proposed.
文摘This is the first of a three-part series of pape rs which introduces a general background of building trajectory-oriented road net work data models, including motivation, related works, and basic concepts. The p urpose of the series is to develop a trajectory-oriented road network data mode l, namely carriageway-based road network data model (CRNM). Part 1 deals with t he modeling background. Part 2 proposes the principle and architecture of the CR NM. Part 3 investigates the implementation of the CRNM in a case study. In the p resent paper, the challenges of managing trajectory data are discussed. Then, de veloping trajectory-oriented road network data models is proposed as a solution and existing road network data models are reviewed. Basic representation approa ches of a road network are introduced as well as its constitution.
文摘针对传统的Web GIS功能简单,可扩展性差等缺点,引入SOA架构和Web服务理念,以及日益增长的地理信息的服务需求,提出了服务式GIS的三要素结构,着重阐述了交通网络分析数据模型及其功能,并探讨了如何以Super Map i Server为平台来设计并实现基于服务式GIS理念的城市交通网络分析信息查询系统,实验测试结果表明该系统可以满足人们日常工作与旅游出行的交通网络分析与查询的需求。
